.content-list{
    opacity: 50;
    display: none;
    position: absolute;
    top:100%;
    left:0;
    background-color: #f9f9f9;
    width:max-content;
    position: absolute;
    box-shadow: 0px 8px 16px 0px red;
    z-index: 1;
}

.content-list a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: inline-block;
    white-space: nowrap; 
}


#yemei li{
    position: relative;
    margin:0 10px;
    margin-right:20px;
}

#school-honver:hover #school{
    display: block;
}


#institute-click:hover #institute{
    display: block;
}
#rc-hover:hover #rc{
    display: block;
}
#xk-hover:hover #xk{
    display: block;
}
#kx-hover:hover #kx{
    display: block;
}
#zs-hover:hover #zs{
    display: block;
}
#hz-hover:hover #hz{
    display: block;
}
#xy-hover:hover #xy{
    display: block;
}
#xx-hover:hover #xx{
    display: block;
}